Damariscotta, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36 °F (low) to 55.2 °F (high). Annual precipitation averages 49.8 Inches. Damariscotta is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.4 °F | 30.6 °F | 3.84 in. |
| February | 13.4 °F | 33.6 °F | 3.53 in. |
| March | 22.8 °F | 41.1 °F | 4.3 in. |
| April | 32.9 °F | 52.9 °F | 4.42 in. |
| May | 43.3 °F | 63.9 °F | 3.79 in. |
| June | 52.7 °F | 72.4 °F | 4.45 in. |
| July | 58.7 °F | 78.3 °F | 3.49 in. |
| August | 57.4 °F | 77.6 °F | 3.22 in. |
| September | 50.3 °F | 70.3 °F | 4.01 in. |
| October | 39.4 °F | 58.2 °F | 5.38 in. |
| November | 29.8 °F | 47.0 °F | 4.61 in. |
| December | 19.3 °F | 36.5 °F | 4.78 in. |
| Annual | 36 °F | 55.2 °F | 49.82 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |